Investing.com – The dollar advanced against its rivals Monday following a slump in the pound amid growing uncertainty about the future of UK Prime Minister Theresa May as Brexit talks remained at an impasse.

The U.S. dollar index, which measures the greenback against a trade-weighted basket of six major currencies, rose by 0.30% to 95.73.

This comes in the wake of rumors that May is set to face a leadership challenge as her attempts to unlock Brexit talks by considering an extension to the transition period beyond the end date of December 2020 has angered pro- and anti-EU factions in her Conservative Party.

USD/CAD, meanwhile, rose 0.02% to C$1.3109 as falling crude prices pressured the loonie. But gains were limited amid expectations for a Bank of Canada rate hike later this week.

The yen, meanwhile, struggled to pare losses even as a report from Axios, citing unnamed sources, suggested that the U.S.-China trade war was set to intensify as President Donald Trump wants Beijing to “suffer more.”

The dollar’s strong start to the week comes as analysts at JPMorgan continued to tout further upside momentum, noting that the greenback’s “non-cyclical characteristics as the preeminent global funder particularly into emerging markets, and its ongoing role as the liquidity haven of choice” should keep it “broadly supported through year-end.”